document.write( "Question 456022: How do you solve rational expression using Lowest Common Denominator and cross multiplying?\r
\n" ); document.write( "\n" ); document.write( "5/a^2= (-4/a) +1\r
\n" ); document.write( "\n" ); document.write( "5 over a squared = (negative 4 over a) plus 1
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Algebra.Com's Answer #313040 by edjones(8007)\"\" \"About 
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5/a^2= (-4/a) +1
\n" ); document.write( "5=-4a+a^2 Multiply each side by a^2.
\n" ); document.write( "a^2-4a-5=0
\n" ); document.write( "(a-5)(a+1)=0
\n" ); document.write( "a=5, a=-1
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\n" ); document.write( "Ed
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